The U.S. Copyright Office has published a Federal Register notice extending the deadline for submission of written comments in response to its May 17, 2016, Notice of Inquiry regarding the mandatory deposit of electronic books and sound recordings available only online. Written comments in response to the Notice are now due no later than 11:59 p.m. eastern time on August 18, 2016. Additional information, including instructions on how to submit a comment, is available here.